murphyRicinus communis (Castor) seed oil
AKA: Castor bean, Castor Seed Oil
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Plant-Derived
Fragrance
Skin Conditioner
Plant Oil
Not Clean
OriginNative to India, East Africa. Derived from seeds of Ricinus communis, a plant in the Euphorbiaceae family native to East Africa and India. Extracted through cold-pressing or solvent extraction of the seeds to obtain the oil.
Ricinus Communis (Castor) Seed Oil is a cosmetic ingredient used as masking, perfuming, skin conditioning. Rated moderate hazard by EWG. Assessed as safe by the CIR.
Family
Euphorbiaceae (Spurge family)
Plant Part
Seed
Lifeform
Shrub or tree
Climate
Seasonally dry tropical
CAS #
8001-79-4
Form
Oil
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Masking
Perfuming
Added for scent. Can be natural or synthetic. Common irritant and allergen — one of the top reasons people react to products.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Anti-Inflammatory
Moisturizing
Strengthens Barrier
Softens and smooths skin
Provides scent
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
3
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not Phototoxic
Human test found no phototoxicity in the CIR safety assessment (CIR 353)
Mixed Eye Irritation Results
5 studies / 3 irritating / 1 mixed / 1 not irritating / reactions slight to mild (CIR 353)
Mixed Skin Irritation Results
9 studies / 6 irritating / 1 mixed / 2 not irritating / reactions slight to severe (CIR 353)
Mixed Comedogenicity Results
Both comedogenic and non-comedogenic results in the CIR safety assessment (CIR 353)
Regulatory Agencies
Verified Jun 2026
Data: Kew POWO · CosIng · EWG · CIR